Chemours R410A replacement to be R452B

The Chemours low GWP refrigerant touted as a competitor to R32 in air conditioners has been provisionally assigned the ASHRAE number R452B. Final approval and assignment of the ASHRAE classification is expected in June 2016, after Chemours’ Opteon XL55 successfully completed ANSI/ASHRAE flammability and toxicology testing.